Airship-propeller.



W. MGCARNS.

AIRSHIP PROPBLLER.

' APPLICATION FILED AUG. 1o, 1912.

Patented May 13, 1913.

TTI/es) WMM/temas UNITED sTATEs 'PATENT Be it known thatfI, WLLIAM McCAmNs, a citizen'of the United Statespresiding at. Eldorado, in the county of Saline and .State of illinois, have invented certain new and useful Improvements in Airship-Propcllers: of which the following is a' specification, reference being had to the accompanying drawings. f

This invention relates to improvements in air ship propellers and has-for its primary' air currents.

object to provide a device of this character whereby a' maximiimfof propiilsive effort may be obtained .with the use of a single propeller, so that the Weight to be sustainedin the movement of the ship may be greatly reduced.

Another object of the invention resides in the provision of an air ship propeller en bodying improved stabilizing for equilibrizing means whereby the vessel will `be maintained in its elevated position in contrary A still further object of the invention resides in the. provision of an airship pro-- pelleiof simple and novel constructionv which may be produced atvsmall cost. and is highly etiicient,"diirable and reliable in operation. i ,l y

iVith the above and other objects in View, this invention consistsI of thc novel details of construction. combination. formation and arrangement of parts as Will b'e hereinafter more fully described, claimed and particularly pointed out in the-accompanying draw-l ings. in' Which- Figure-1 is--a longitudinal section of a propellei" constructed in accordance with the present inrentioii. /l"i; f. 2 is an cnil elevation thereof. Fig. v3 is'a transverse section taken on the liuc 3 3 of Fi nl. Fig. 4 is a detail perspective view of ne of the Webs.

Referring iii.,.dctail to the di'a\\'ing.'"tl ie Vnumeral 5 indicatesl generally an elongated chamber. which iir the present. instance, is shown of rectangular form. and is provided with tapering pyramidal shaped-ends 6. The propeller. designated at 7, is mounted to rotate in a central enlarged chamber 8 r karranged interii'iediate of the ends of the i'nain elongated chamber 5 and constituting u portion thereof.' This central chamber will preferably bc constructed as an individual element and the sections of the main chamber 5 on either side thereof`may be soldered, rivet-d, 'or otherwise-l lor connected tti this central .propeller. ,clttimber.

-The device is primarily adapted for the proponen ofidingibieairsiiips and ai@ proi pellet 7 is driven by a motor situated exteriorly of' the chamber 5 and suitably mounted in the ltraine-work ofthe machine.

Theelongated chamber 5 on either side of the propeller chamber 8 includes` a plurality of sections 9, each of which is provided with a web 10 connectin the opposed walls thereof. When the sect-ions of the chamber are assembled and-secured together,`these webs are alternately disposed in planes atriglit angles to each other and' provide means whereby theair currents'are broken up and resistance tothe movement of 'the machine reduced to a minimum.

ln each end of thevelongated chamber theair inlet tubes 11 are arranged. 4Four suchl tubes are preferably employedat each end ,i 'Speciltca'itionot Letters Itlttext.l liy 13, v agpiiceaqn'iiiedsugs unin. sriiiid ingeeft.V 'i

of the chamber and provided wit-hslightly which are fixed to the walls of the fpyramidal ends 6 of the air receiving.r chamber. In the forward movement ofthe vessel, the

' bell shaped ends, as clearly shown iii Fig. 2.

air currents enter through these tubes-11 at'- one end of the chamber '5, and are broken up by the Webs 10 and are then driven or directed vby the propeller 7 against the webs l0 in the rear portion of-the chamber 5, said currents finally escaping'through the other tube It at. the other end of the air chamber".

From the foregoing, it is thought. that the construction and manner vof usc.t-ogether with the many advantages which accrue to Ain v improved propeller construction will hel readily understood.

' The entire device may be inexpensivelymanufactured. and as the same is extremely light in weight. it. will not add to any 'material extent to the weight of the vessel.

'lhe chamber sections are preferably constructed of aluminum. AWhile l have stat-ed that the same are of rectangular form, it will be obvious that they may be cylindrical or'o any other preferred configuration.

The devicel is eiiicient and reliable inv use and is capable of application to any of the various well known forms of ships used in aerial navigation.

lVliile l have shown and `described the i.

preferred construction and arrangement of the various elements. it will be obvious that the invention is susceptible of a great many 1 ctiqnsythe .webs

, 6" X11-a .propeller for aerlal vessels, .zcentruly `ilongitudinni- 1y extendingfifkzhambers o'nsist-4 @ich fof the chamy-Wtnesses y l 1 H. B. HmPHILL,

W, B. MARTI'X;

Y ran .'1 inxone end-of each '0f the longitud# l5 l 

